Railgun is a privacy-focused blockchain protocol that enables confidential transactions using zero-knowledge proofs and liquidity mixers, while incorporating a compliance mechanism “private proofs of innocence” that prevents illicit transactions.

Quotes that support claims

Buterin says the Railgun is a privacy pool mechanism that would facilitate private transactions on Ethereum. However, it would not allow illicit funds to benefit from its anonymity. For clarification, Railgun allows users to make confidential transactions using zero-knowledge proofs (ZKPs). This allows users to make fund deposits into Railgun and withdraw privately later. Read more on U.Today https://u.today/vitalik-buterin-breaks-silence-on-zklend-exploit-flaunts-railgun

Railgun is a protocol that enables users to conduct anonymous transactions on Ethereum by using zero-knowledge proofs and liquidity pools to hide details about the sender, recipient and transaction amount. However, unlike most so-called “mixers,” Railgun has implemented a system called “Private Proofs of Innocence” designed to block illicit funds from entering the privacy pool. When deposited into Railgun, tokens are automatically screened against a list of known malicious addresses.